make the logblame power toggle test slightly better

Bug: 37252687
Test: development/tools/logblame/power_toggle_test
Change-Id: Ie218bb0094bf1574de2e9ab51775984f4969307f
diff --git a/tools/logblame/power_toggle_test b/tools/logblame/power_toggle_test
index e2630e4..508c49f 100755
--- a/tools/logblame/power_toggle_test
+++ b/tools/logblame/power_toggle_test
@@ -16,7 +16,9 @@
 analyze_pid=$!
 
 sleep 5
-for i in {0..10..1}; do
+for i in {0..5..1}; do
+    adb shell input keyevent KEYCODE_POWER
+    sleep 5
     adb shell input keyevent KEYCODE_POWER
     sleep 5
     adb shell wm dismiss-keyguard